CN107325469A - A kind of silica sand pretreating agent and its application - Google Patents
A kind of silica sand pretreating agent and its application Download PDFInfo
- Publication number
- CN107325469A CN107325469A CN201710494655.2A CN201710494655A CN107325469A CN 107325469 A CN107325469 A CN 107325469A CN 201710494655 A CN201710494655 A CN 201710494655A CN 107325469 A CN107325469 A CN 107325469A
- Authority
- CN
- China
- Prior art keywords
- parts
- silica sand
- agent
- pretreating agent
- mixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/24—Homopolymers or copolymers of amides or imides
- C08L33/26—Homopolymers or copolymers of acrylamide or methacrylamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/08—Ingredients agglomerated by treatment with a binding agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Lubricants (AREA)
Abstract
The invention provides a kind of silica sand pretreating agent and its application, it is related to silica sand processing technique field；Pretreating agent is made up of the raw material of following parts by weight：30 45 parts of 5 12 parts of hydroxyethyl cellulose, 10 20 parts of polyacrylamide, 58 parts of corrdination type titanate coupling agent, 23 parts of zinc stearate, 69 parts of oleic acid, 10 15 parts of modified sodium chromate and auxiliary agent；Pretreating agent can be in silica sand Surface coating thin film, and the film can increase the bonding force between silica sand and resin, improves the intensity of core, cost-effective.
Description
Technical field
The present invention relates to silica sand processing technique field, and in particular to a kind of silica sand pretreating agent and its application.
Background technology
Dioxide-containing silica is high in natural silica Sand, with it is heat-resist, grain type is regular the features such as, be the important of casting sand type
Material.Resin is mixed as bonding agent with natural silica Sand using cold-box process in current foundary industry, under curing agent effect
The hardening of casting compound is set to obtain hard solid cast sand mould.The widely used resin adhesive of cold box process has phenol
Urea formaldehyde, PIC and epoxy resin etc., the sand mould after solidification need certain mechanical strength, with ensure carry or
Pattern is not destroyed in casting cycle.The method that current sand mould improves intensity mainly has：1st, increase resin consumption, 2, tree
Coupling agent is added when fat and natural silica Sand mixing, these methods have some defects, increase resin demand can make getting angry for pattern
Amount increase, influences surface quality of continuous castings and increase production cost, and the coupling agent added when resin and natural silica Sand are mixed is simultaneously
The interface in silica sand and resin is not added, the efficiency of coupling agent is reduced, intensity increase is not obvious.
The content of the invention
(1) technical problem solved
In view of the shortcomings of the prior art, the invention provides a kind of silica sand pretreating agent and its application so that sand mould
Intensity is improved, resin demand in reduction molding sand, cost-effective.
(2) technical scheme
To realize object above, the present invention is achieved by the following technical programs：
A kind of silica sand pretreating agent, is made up of the raw material of following parts by weight：5-12 parts of hydroxyethyl cellulose, polyacrylamide
10-20 parts, 5-8 parts of corrdination type titanate coupling agent, 2-3 parts of zinc stearate, 6-9 parts of oleic acid, 10-15 parts of modified sodium chromate and help
30-45 parts of agent, the auxiliary agent is made up of silicone oil, water and ethanol；
The preparation method of the modified sodium chromate is：Weigh 10g sodium hydroxides and be dissolved in 500ml deionized waters and be configured to
0.5mol/L sodium hydroxide solutions, weigh 15g sodium chromates and are dissolved in sodium hydroxide solution, stir 30-40min, and filtering will be filtered
Sodium chromate afterwards is put into 500-520 DEG C of baking oven and is incubated 2-3h, and modified sodium chromate is made；
The auxiliary agent compound method is：It is 2 by volume ratio:3 water and ethanol is well mixed, and mixed liquor is heated into 60-
70 DEG C, the silicone oil of 1/4 mixeding liquid volume is added into mixed liquor, is stirred, auxiliary agent is made.
It is preferred that, the pretreating agent is made up of the raw material of following parts by weight：7 parts of hydroxyethyl cellulose, polyacrylamide
15 parts, 6 parts of corrdination type titanate coupling agent, 2 parts of zinc stearate, 6 parts of oleic acid, 40 parts of 12 parts of modified sodium chromate and auxiliary agent.
It is preferred that, the pretreating agent preparation method is as follows：(1) by hydroxyethyl cellulose, polyacrylamide and corrdination type
Titanate coupling agent is well mixed, and mixed-powder is obtained with mortar grinder 10-20min；(2) auxiliary agent and oleic acid are well mixed, plus
Enter zinc stearate and modified sodium chromate, stir, mixed liquor is made；(3) mixed-powder for preparing step (1) is added to step
Suddenly in (2) mixed liquor, stir,；(4) mixed liquor made from step (3) is put into insulated and stirred 8- in 30-35 DEG C of baking oven
10h, is made the pretreating agent.
Application of the described silica sand pretreating agent on silica sand, method is as follows：Silica sand is put on slewing, pre-processed
Agent is sprayed at silica sand surface after being atomized through atomizer, the silica sand after spraying is put into vacuum drying oven and dried, and will be dried with vibratory sieve
Silica sand vibrosieve, obtain pre-process silica sand.
It is preferred that, the drying temperature is 60-80 DEG C.
(3) beneficial effect
The invention provides a kind of silica sand pretreating agent and its application, its advantage is：Pretreating agent can be in silica sand
Surface coating thin film, the film can increase the bonding force between silica sand and resin, improve the intensity of core；Ethoxy is fine
Internal crosslinking occurs in the presence of corrdination type titanate coupling agent for dimension element and polyacrylamide and outside is coupled, in pretreating agent
In play a leading role, zinc stearate makes pretreating agent more be uniformly dispersed in when can be sprayed on silica sand surface in pretreating agent
Silica sand surface, oleic acid increases the globality of pretreating agent, prevents the silica sand after spraying from being decomposed in drying course peeling.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention,
Technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the present invention one
Divide embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making
The every other embodiment obtained under the premise of creative work, belongs to the scope of protection of the invention.
Embodiment 1：
A kind of silica sand pretreating agent, is made up of the raw material of following parts by weight：7 parts of hydroxyethyl cellulose, polyacrylamide 15
40 parts of part, 6 parts of corrdination type titanate coupling agent, 2 parts of zinc stearate, 6 parts of oleic acid, 12 parts of modified sodium chromate and auxiliary agent, it is described to help
Agent is made up of silicone oil, water and ethanol；
The preparation method of the modified sodium chromate is：Weigh 10g sodium hydroxides and be dissolved in 500ml deionized waters and be configured to
0.5mol/L sodium hydroxide solutions, weigh 15g sodium chromates and are dissolved in sodium hydroxide solution, stir 30min, filtering, after filtering
Sodium chromate be put into 510 DEG C of baking ovens and be incubated 2h, modified sodium chromate is made；
The auxiliary agent compound method is：It is 2 by volume ratio:3 water and ethanol is well mixed, and mixed liquor is heated into 65
DEG C, the silicone oil of 1/4 mixeding liquid volume is added into mixed liquor, is stirred, auxiliary agent is made.
The pretreating agent preparation method is as follows：(1) it is hydroxyethyl cellulose, polyacrylamide and corrdination type titanate esters are even
Join agent to be well mixed, mixed-powder is obtained with mortar grinder 10min；(2) auxiliary agent and oleic acid are well mixed, add zinc stearate and
Modified sodium chromate, stirs, and mixed liquor is made；(3) mixed-powder for preparing step (1) is added to step (2) mixed liquor
In, stir,；(4) mixed liquor made from step (3) is put into insulated and stirred 8h in 35 DEG C of baking ovens, the pretreatment is made
Agent.
Application of the silica sand pretreating agent on silica sand, method is as follows：Silica sand is put on slewing, pretreating agent
Silica sand surface is sprayed at after being atomized through atomizer, the silica sand after spraying is put into vacuum drying oven and dried, with vibratory sieve by drying
Silica sand vibrosieve, obtains pre-processing silica sand.The drying temperature is 80 DEG C.
Embodiment 2：
A kind of silica sand pretreating agent, is made up of the raw material of following parts by weight：5 parts of hydroxyethyl cellulose, polyacrylamide 12
45 parts of part, 8 parts of corrdination type titanate coupling agent, 2 parts of zinc stearate, 9 parts of oleic acid, 15 parts of modified sodium chromate and auxiliary agent, it is described to help
Agent is made up of silicone oil, water and ethanol；
The preparation method of the modified sodium chromate is：Weigh 10g sodium hydroxides and be dissolved in 500ml deionized waters and be configured to
0.5mol/L sodium hydroxide solutions, weigh 15g sodium chromates and are dissolved in sodium hydroxide solution, stir 35min, filtering, after filtering
Sodium chromate be put into 520 DEG C of baking ovens and be incubated 3h, modified sodium chromate is made；
The auxiliary agent compound method is：It is 2 by volume ratio:3 water and ethanol is well mixed, and mixed liquor is heated into 70
DEG C, the silicone oil of 1/4 mixeding liquid volume is added into mixed liquor, is stirred, auxiliary agent is made.
The pretreating agent preparation method is as follows：(1) it is hydroxyethyl cellulose, polyacrylamide and corrdination type titanate esters are even
Join agent to be well mixed, mixed-powder is obtained with mortar grinder 20min；(2) auxiliary agent and oleic acid are well mixed, add zinc stearate and
Modified sodium chromate, stirs, and mixed liquor is made；(3) mixed-powder for preparing step (1) is added to step (2) mixed liquor
In, stir,；(4) mixed liquor made from step (3) is put into insulated and stirred 9h in 30 DEG C of baking ovens, the pretreatment is made
Agent.
Application of the silica sand pretreating agent on silica sand, method is as follows：Silica sand is put on slewing, pretreating agent
Silica sand surface is sprayed at after being atomized through atomizer, the silica sand after spraying is put into vacuum drying oven and dried, with vibratory sieve by drying
Silica sand vibrosieve, obtains pre-processing silica sand.The drying temperature is 70 DEG C.
Embodiment 3：
A kind of silica sand pretreating agent, is made up of the raw material of following parts by weight：10 parts of hydroxyethyl cellulose, polyacrylamide 10
35 parts of part, 5 parts of corrdination type titanate coupling agent, 3 parts of zinc stearate, 7 parts of oleic acid, 10 parts of modified sodium chromate and auxiliary agent, it is described to help
Agent is made up of silicone oil, water and ethanol；
The preparation method of the modified sodium chromate is：Weigh 10g sodium hydroxides and be dissolved in 500ml deionized waters and be configured to
0.5mol/L sodium hydroxide solutions, weigh 15g sodium chromates and are dissolved in sodium hydroxide solution, stir 40min, filtering, after filtering
Sodium chromate be put into 510 DEG C of baking ovens and be incubated 2h, modified sodium chromate is made；
The auxiliary agent compound method is：It is 2 by volume ratio:3 water and ethanol is well mixed, and mixed liquor is heated into 60
DEG C, the silicone oil of 1/4 mixeding liquid volume is added into mixed liquor, is stirred, auxiliary agent is made.
The pretreating agent preparation method is as follows：(1) it is hydroxyethyl cellulose, polyacrylamide and corrdination type titanate esters are even
Join agent to be well mixed, mixed-powder is obtained with mortar grinder 15min；(2) auxiliary agent and oleic acid are well mixed, add zinc stearate and
Modified sodium chromate, stirs, and mixed liquor is made；(3) mixed-powder for preparing step (1) is added to step (2) mixed liquor
In, stir,；(4) mixed liquor made from step (3) is put into insulated and stirred 10h in 35 DEG C of baking ovens, the pretreatment is made
Agent.
Application of the silica sand pretreating agent on silica sand, method is as follows：Silica sand is put on slewing, pretreating agent
Silica sand surface is sprayed at after being atomized through atomizer, the silica sand after spraying is put into vacuum drying oven and dried, with vibratory sieve by drying
Silica sand vibrosieve, obtains pre-processing silica sand.The drying temperature is 65 DEG C.
Embodiment 4：
A kind of silica sand pretreating agent, is made up of the raw material of following parts by weight：12 parts of hydroxyethyl cellulose, polyacrylamide 20
30 parts of part, 7 parts of corrdination type titanate coupling agent, 3 parts of zinc stearate, 8 parts of oleic acid, 14 parts of modified sodium chromate and auxiliary agent, it is described to help
Agent is made up of silicone oil, water and ethanol；
The preparation method of the modified sodium chromate is：Weigh 10g sodium hydroxides and be dissolved in 500ml deionized waters and be configured to
0.5mol/L sodium hydroxide solutions, weigh 15g sodium chromates and are dissolved in sodium hydroxide solution, stir 35min, filtering, after filtering
Sodium chromate be put into 500 DEG C of baking ovens and be incubated 3h, modified sodium chromate is made；
The auxiliary agent compound method is：It is 2 by volume ratio:3 water and ethanol is well mixed, and mixed liquor is heated into 65
DEG C, the silicone oil of 1/4 mixeding liquid volume is added into mixed liquor, is stirred, auxiliary agent is made.
The pretreating agent preparation method is as follows：(1) it is hydroxyethyl cellulose, polyacrylamide and corrdination type titanate esters are even
Join agent to be well mixed, mixed-powder is obtained with mortar grinder 10min；(2) auxiliary agent and oleic acid are well mixed, add zinc stearate and
Modified sodium chromate, stirs, and mixed liquor is made；(3) mixed-powder for preparing step (1) is added to step (2) mixed liquor
In, stir,；(4) mixed liquor made from step (3) is put into insulated and stirred 8h in 30 DEG C of baking ovens, the pretreatment is made
Agent.
Application of the silica sand pretreating agent on silica sand, method is as follows：Silica sand is put on slewing, pretreating agent
Silica sand surface is sprayed at after being atomized through atomizer, the silica sand after spraying is put into vacuum drying oven and dried, with vibratory sieve by drying
Silica sand vibrosieve, obtains pre-processing silica sand.The drying temperature is 60 DEG C.
Performance test：
(1) when reaching identical tensile strength, resin amount is as follows during casting：
(2) when reaching identical tensile strength, the gas forming amount of core is as follows during casting：
From above table, after preprocessed dose of pretreatment of silica sand, in the case where reaching identical tensile strength, pre- place
Silica sand after reason can reduce resin demand, thus it is cost-effective, while gas forming amount is also reduced, improve the intensity of molding sand.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or deposited between operating
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Nonexcludability is included, so that process, method, article or equipment including a series of key elements not only will including those
Element, but also other key elements including being not expressly set out, or also include being this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in process, method, article or equipment including the key element.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a kind of silica sand pretreating agent, it is characterised in that be made up of the raw material of following parts by weight：5-12 parts of hydroxyethyl cellulose,
10-20 parts of polyacrylamide, 5-8 parts of corrdination type titanate coupling agent, 2-3 parts of zinc stearate, 6-9 parts of oleic acid, modified sodium chromate
10-15 parts and 30-45 parts of auxiliary agent, the auxiliary agent is made up of silicone oil, water and ethanol；
The preparation method of the modified sodium chromate is：Weigh 10g sodium hydroxides and be dissolved in 500ml deionized waters and be configured to
0.5mol/L sodium hydroxide solutions, weigh 15g sodium chromates and are dissolved in sodium hydroxide solution, stir 30-40min, and filtering will be filtered
Sodium chromate afterwards is put into 500-520 DEG C of baking oven and is incubated 2-3h, and modified sodium chromate is made；
The auxiliary agent compound method is：It is 2 by volume ratio:3 water and ethanol is well mixed, and mixed liquor is heated into 60-70 DEG C,
The silicone oil of 1/4 mixeding liquid volume is added into mixed liquor, is stirred, auxiliary agent is made.
2. silica sand pretreating agent as claimed in claim 1, it is characterised in that be made up of the raw material of following parts by weight：Ethoxy
7 parts of cellulose, 15 parts of polyacrylamide, 6 parts of corrdination type titanate coupling agent, 2 parts of zinc stearate, 6 parts of oleic acid, modified chromic acid
40 parts of 12 parts of sodium and auxiliary agent.
3. silica sand pretreating agent as claimed in claim 1, it is characterised in that preparation method is as follows：(1) by hydroxy ethyl fiber
Element, polyacrylamide and corrdination type titanate coupling agent are well mixed, and mixed-powder is obtained with mortar grinder 10-20min；(2) will
Auxiliary agent and oleic acid are well mixed, add zinc stearate and modified sodium chromate, stir, mixed liquor is made；(3) by step (1)
The mixed-powder of preparation is added in step (2) mixed liquor, is stirred,；(4) mixed liquor made from step (3) is put into 30-
Insulated and stirred 8-10h in 35 DEG C of baking ovens, is made the pretreating agent.
4. application of the silica sand pretreating agent as claimed in claim 1 on silica sand, it is characterised in that method is as follows：By silica sand
It is put on slewing, pretreating agent is sprayed at silica sand surface after being atomized through atomizer, the silica sand after spraying is put into vacuum drying oven
Middle drying, with vibratory sieve by the silica sand vibrosieve of drying, obtains pre-processing silica sand.
5. application of the silica sand pretreating agent as claimed in claim 4 on silica sand, it is characterised in that the drying temperature is
60-80℃。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710494655.2A CN107325469A (en) | 2017-06-26 | 2017-06-26 | A kind of silica sand pretreating agent and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710494655.2A CN107325469A (en) | 2017-06-26 | 2017-06-26 | A kind of silica sand pretreating agent and its application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107325469A true CN107325469A (en) | 2017-11-07 |
Family
ID=60194473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710494655.2A Pending CN107325469A (en) | 2017-06-26 | 2017-06-26 | A kind of silica sand pretreating agent and its application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107325469A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548030A (en) * | 2019-09-24 | 2021-03-26 | 沈阳铸造研究所有限公司 | Surface treatment method of silica sand for casting sand core ink-jet 3D printing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104959526A (en) * | 2015-07-29 | 2015-10-07 | 武汉理工大学 | Modifying method for casting silica sand |
| CN105312484A (en) * | 2014-06-16 | 2016-02-10 | 彰武县联信铸造硅砂有限公司 | Silica sand surface pre-treatment process and application thereof |
| CN105562582A (en) * | 2016-02-01 | 2016-05-11 | 安徽埃斯克制泵有限公司 | Casting sand for pump body sand mold casting |
| CN105665614A (en) * | 2016-02-17 | 2016-06-15 | 安徽索立德铸业有限公司 | Casting sand for casting sand mold and preparing method of casting sand |
-
2017
- 2017-06-26 CN CN201710494655.2A patent/CN107325469A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312484A (en) * | 2014-06-16 | 2016-02-10 | 彰武县联信铸造硅砂有限公司 | Silica sand surface pre-treatment process and application thereof |
| CN104959526A (en) * | 2015-07-29 | 2015-10-07 | 武汉理工大学 | Modifying method for casting silica sand |
| CN105562582A (en) * | 2016-02-01 | 2016-05-11 | 安徽埃斯克制泵有限公司 | Casting sand for pump body sand mold casting |
| CN105665614A (en) * | 2016-02-17 | 2016-06-15 | 安徽索立德铸业有限公司 | Casting sand for casting sand mold and preparing method of casting sand |
Non-Patent Citations (1)
| Title |
|---|
| 何铁林 赵玉茹: "《世界水处理剂商品手册》", 30 June 2004, 化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548030A (en) * | 2019-09-24 | 2021-03-26 | 沈阳铸造研究所有限公司 | Surface treatment method of silica sand for casting sand core ink-jet 3D printing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102366812B (en) | A kind of preparation method of sodium silicate sand used for casting | |
| CN101607301A (en) | A kind of soluble core and preparation method thereof | |
| CN106825385A (en) | A kind of thermosetting resin sand mould preparation technology | |
| CN104815943A (en) | Novel modified phosphate inorganic binder for aluminum alloy casting, and preparation method thereof | |
| CN105522104A (en) | Expendable mold coating and preparation process thereof | |
| CN107880232B (en) | Special furan resin for additive manufacturing molding sand and preparation method | |
| CN103467059A (en) | Method for preparing magnesite products | |
| CN107325469A (en) | A kind of silica sand pretreating agent and its application | |
| CN102877366B (en) | Method for preparing wet curtain paper | |
| CN108296442A (en) | A kind of 3D printing precoated sand moulding process | |
| CN108543917B (en) | A method of solving heat resisting steel product cavity defect | |
| CN106380607A (en) | Preparation method of modified wood powder | |
| CN102585129B (en) | Urea-formaldehyde resin for artificial board and modification modulation method thereof | |
| CN107138678B (en) | A kind of 3D inkjet printing phosphoric acid based binder powder curing agent and preparation method thereof | |
| CN105312484B (en) | A kind of silica sand surface pre-treating process and its application | |
| CN111548052B (en) | Artificial quartz stone plate and preparation method thereof | |
| CN105964875A (en) | High-cohesiveness wet type molding sand used for cast flanges and a preparing method thereof | |
| CN108339929B (en) | A kind of forming and fixing agent and its preparation process and application | |
| CN111266521A (en) | Composite sand core for casting and preparation method thereof | |
| CN112142936A (en) | Additive manufacturing rapid prototyping furan resin and preparation method thereof | |
| CN110102703A (en) | A kind of novel environment friendly smoke-free and tasteless precoated sand and preparation method thereof | |
| CN105149520B (en) | A kind of method for avoiding furan resin-sand sand washing and blacking scab | |
| KR102243038B1 (en) | Method for fabricating sand casting mold and core using inorganic binder and method for fabricating product | |
| CN113635568B (en) | Silicon rubber mold and preparation method thereof | |
| CN214488767U (en) | Three-face sand shooting box of core shooting machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171107 |